the question was placed the jay carney yesterday. here is his response. [video clip] replacing hillary clinton for joe biden. >> it is important to know that campaigns and posters test a lot of things. what i can tell you without a doubt is that the president never considered that and, had anyone brought that idea to him, he would have left it out of the room. that former chief of staff bill daley said as much this morning. and here's why. joe biden has been an asset to this president into campaigns and throughout five years of this administration. whether it was handling the implementation of the recovery, handling the very sensitive and important portfolio of iraq in the first term or his key role in working with congress on some important negotiations, joe biden has been an excellent partner in the president's view. and then, as a candidate, i think, if you look at the role he played in 2012 when you look debate,ob he did in his i think there is little doubt that he was an enormous asset to the entire cause and enterprise. that is how the president fee